T9074-AS-GIB-010/271 Rev 1
Table 3-1. Examples of Penetrameter Identification.
MIL-Type Penetrameter Identification Number 2/
ASTM-Type Penetrameter Identification Number 2/
Material Thickness 1/ (Inches)
Penetrameter Thickness (Inches)
25 50 75
0.005 0.010 0.015 0.020 0.030 0.040 0.060 0.110 0.180 0.200
0.25 0.50 0.75
5
10 15 20 30 40 60
1.0 1.5 2.0 3.0 5.5 9.0
1.0 1.5 2.0 3.0 5.5 9.0
110 180 200
10.0
10.0
NOTES: 1/
The 0.005-inch thick penetrameter shall be used for material thickness less than 0.25 inch unless otherwise
specified in the applicable specification or purchase order. 2/ For 2 percent sensitivity.
3.5.4.2 Castings and Forgings. Castings or forgings may be radiographed in the as-cast, as-forged, or rough machined condition provided the surface condition does not mask rejectable defects and the following requirements for penetrameter selection are met: a. Structural castings and forgings: The penetrameter shall be based on the actual or nominal thickness of the material being radiographed (T s as defined in 3.2.4). For single-wall viewing, the penetrameter shall be based on T s . For double-wall viewing, the penetrameter shall be based on 2T s . b. Other castings and forgings: The penetrameter thickness shall be based on the actual or nominal thickness of the material being radiographed (T s as defined in 3.2.4). For single-wall viewing, the penetrameter shall be based on T s . For double-wall viewing, the penetrameter shall be based on 2T s . However, if the thickness to be radiographed exceeds the nominal thickness of the finished piece, the penetrameter size shall be based on a thickness which is not greater than 20 percent more than the nominal thickness of the finished piece, or ¼ inch, whichever is greater. The penetrameter size shall not be based on a thickness greater than the actual thickness to be radiographed. For areas in castings that have been end-prepared for welding, the penetrameter shall be selected based on the actual or nominal thickness of the area adjacent to, but exclusive of, the weld end-preparation. c. Any exceptions to the foregoing shall be designated on the drawings or shooting sketches and shall require specific approval of the authorized representative of NAVSEA. d. Techniques specified in 3.5.5 are allowed as long as the requirements of this section are met.
3-9
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